hmm...
-the air inside your office building could have air thats upwards of about 100 times dirtier than the air outside. COULD, not ALWAYS, just some scenarios, mainly in america!
-Laser printers and photocopiers put off ozone, and seriously, how long ago was the filter changed?? laser printers put off tiny particles of toner that can enter deep crevices of your lungs and even enter your bloodstream, and can cause Siderosilicosis, a lung disease commonly found in coal miners.
-"The use of florescent lights and/or over-illumination can cause health concerns including headache, fatigue, stress, anxiety, cardiovascular disease and, wait for it, erectile dysfunction." -see link at bottom of post.
-"According to studies, people who sit at their jobs have increased blood pressure and blood sugar, purely from the act of sitting."
and here's the source of this info, from the masterminds over at Cracked.com!
http://www.cracked.com/article_18654_6-ways-your-office-literally-killing-you.html